#include<stdio.h>
#include<string.h>
#include<unistd.h>

int main()
{
    const char*s1="hello printf\n";
    printf(s1);

    const char*s2="hello fprintf\n";
    fprintf(stdout,s2);

    const char*s3="hello fwrite\n";
    fwrite(s3,strlen(s3),1,stdout);

    const char*s4="hello write[syscall]\n";
    write(1,s4,strlen(s4));

    fork();

    /*//printf("hello iu\n");
    printf("hello iu");
    printf("hello iu");
    printf("hello iu");
    printf("hello iu");
    printf("hello iu");
    sleep(3);*/
    return 0;
}
